/*
 * Copyright 2000-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.java.refactoring;

import com.intellij.openapi.command.CommandProcessor;
import com.intellij.openapi.fileEditor.impl.LoadTextUtil;
import com.intellij.openapi.util.io.FileUtilRt;
import com.intellij.openapi.vfs.VfsUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.refactoring.BaseRefactoringProcessor;
import com.intellij.testFramework.FileBasedTestCaseHelper;
import org.junit.Test;
import org.junit.runner.RunWith;

import java.io.File;

@RunWith(com.intellij.testFramework.Parameterized.class)
public abstract class LightRefactoringParameterizedTestCase extends LightRefactoringTestCase implements FileBasedTestCaseHelper {

  protected static final String BEFORE_PREFIX = "before";
  protected static final String AFTER_PREFIX = "after";
  protected static final String CONFLICTS_SUFFIX = ".conflicts.txt";

  protected abstract void perform();

  protected abstract String getAfterFile(String fileNameCore);
  protected abstract String getBeforeFile(String fileNameCore);

  @Test
  public void runSingle() throws Throwable {
    final Throwable[] throwables = new Throwable[1];

    final Runnable runnable = () -> {
      try {
        final String filePath = getBeforeFile(myFileSuffix);
        configureByFile(filePath);

        final File testDir = new File(getTestDataPath(), filePath).getParentFile();
        final String afterName = getAfterFile(myFileSuffix);
        final boolean conflictShouldBeFound = !new File(testDir, afterName).exists();
        try {
          perform();
          if (conflictShouldBeFound) {
            fail("Conflict expected.");
          }
        }
        catch (BaseRefactoringProcessor.ConflictsInTestsException exception) {
          if (!conflictShouldBeFound) {
            fail("Conflict not expected");
          } else {
            final File conflicts = new File(testDir, FileUtilRt.getNameWithoutExtension(myFileSuffix) + CONFLICTS_SUFFIX);
            if (!conflicts.exists()) {
              fail("Conflict file " + conflicts.getPath() + " not found");
            }
            final VirtualFile conflictsFile = VfsUtil.findFileByIoFile(conflicts, false);
            assertNotNull(conflictsFile);
            assertEquals(LoadTextUtil.loadText(conflictsFile).toString(), exception.getMessage());
          }
        }

        if (!conflictShouldBeFound) {
          checkResultByFile(getAfterFile(myFileSuffix));
        }
      }
      catch (Throwable e) {
        throwables[0] = e;
      }
    };

    invokeTestRunnable(() -> CommandProcessor.getInstance().executeCommand(getProject(), runnable, "", null));

    if (throwables[0] != null) {
      throw throwables[0];
    }

  }
}
